Rapid histochemical staining method visualizing the role of Fusarium oxysporum catalase in xylem embolism formation and lupine wilt

Fusarium wilt is a common vascular wilt disease caused by some species of Fusarium, of which Fusarium oxysporum is considered as the prime perpetrator of wilt disease .1 It classified, according to the host plant, into forma specialis and survives in a wide range of environments such as arctic, tropical, desert, cultivated and noncultivated soil,2 and spread by different ways such as water splash, planting equipment, transplanting of the infected plant and infected seeds). Fusarium oxysporum exhibits wide spectrum of pathogenicity against many hosts (ex. tomato, tobacco, lupine, cucurbits, sweet potatoes, and banana) at any stage of the plant life cycle.2 Fusarium oxysporum produces symptoms similar to that of Verticillium species (wilt, chlorosis, necrosis, premature leaf drop, discoloration of the vascular system, stunting, and damping-off).